Sharp AQUOS Crystal - Manual (Page 234)

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Additional information on Specific Absorption Rates (SAR) can
be found on the FCC website at
http://transition.fcc.gov/oet/
rfsafety/ .
The World Health Organization has stated that present
scientific information does not indicate the need for any
special precautions for the use of mobile devices. They note
that if you want to reduce your exposure then you can do so
by limiting the length of calls or using a hands-free device to
keep the mobile phone away from the head and body.
World Health Organization
http://www.who.int/emf
List of Specific Absorption Rates (SAR) for radio waves by
smartphone/3G model
http://www.softbank.jp/mobile/support/sar/ (Japanese)